function navSwitch(){
	isShow = false;
	var switchTap = document.getElementById("nav-icon");
	var nav = document.getElementsByClassName("nav")[0];
	console.log(nav);
	switchTap.addEventListener("touchend",function(){
		if(!isShow){
			nav.classList.add("show");
			isShow=true;
		}else{
			nav.classList.remove("show");
			isShow=false;
		}
	})
}
